Vue3.0 设置原型方法并使用

import { ElMessage } from 'element-plus'
app.config.globalProperties.$message = ElMessage    //原型挂载

    const instance = getCurrentInstance()
    const _this = instance.appContext.config.globalProperties
    _this.$message.error('Oops, this is a error message.')

   const { appContext } = getCurrentInstance()
    const globalProperties = appContext.config.globalProperties
    globalProperties.$message.error('Oops, this is a error message.')